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get cose public key and fix some printing

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This commit is contained in:
merlokk 2018-11-26 19:42:37 +02:00
parent 0a2f874ac3
commit 065773377d
2 changed files with 45 additions and 8 deletions
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23
client/cmdhffido.c
View file

@ -720,22 +720,27 @@ int MakeCredentionalParseRes(json_t *root, uint8_t *data, size_t dataLen, bool v
// Credential ID
uint8_t cridlen = (uint16_t)bytes_to_num(&ubuf[53], 2);
PrintAndLog("Credential id[%d]: %s", cridlen, sprint_hex(&ubuf[55], cridlen));
PrintAndLog("Credential id[%d]: %s", cridlen, sprint_hex_inrow(&ubuf[55], cridlen));
JsonSaveBufAsHexCompact(root, "$.AppData.CredentialId", &ubuf[55], cridlen);
//Credentional public key (COSE_KEY)
uint8_t coseKey[65] = {0};
uint16_t cplen = n - 55 - cridlen;
PrintAndLog("Credentional public key (COSE_KEY)[%d]: %s", cplen, sprint_hex(&ubuf[55 + cridlen], cplen));
PrintAndLog("Credentional public key (COSE_KEY)[%d]: %s", cplen, sprint_hex_inrow(&ubuf[55 + cridlen], cplen));
JsonSaveBufAsHexCompact(root, "$.AppData.COSE_KEY", &ubuf[55 + cridlen], cplen);
if (showCBOR) {
PrintAndLog("COSE structure:");
PrintAndLog("---------------- CBOR ------------------");
TinyCborPrintFIDOPackage(fido2COSEKey, true, &ubuf[55 + cridlen], cplen);
PrintAndLog("---------------- CBOR ------------------");
}
res = COSEGetECDSAKey(&ubuf[55 + cridlen], cplen, verbose, coseKey);
if (res)
if (res) {
PrintAndLog("ERROR: Can't get COSE_KEY.");
else
} else {
PrintAndLog("COSE public key: %s", sprint_hex_inrow(coseKey, sizeof(coseKey)));
JsonSaveBufAsHexCompact(root, "$.AppData.COSEPublicKey", coseKey, sizeof(coseKey));
}
free(ubuf);
@ -767,13 +772,13 @@ int MakeCredentionalParseRes(json_t *root, uint8_t *data, size_t dataLen, bool v
if (!strcmp(key, "sig")) {
res = CborGetBinStringValue(&mapsmt, sign, sizeof(sign), &signLen);
cbor_check(res);
PrintAndLog("signature [%d]: %s", signLen, sprint_hex(sign, signLen));
PrintAndLog("signature [%d]: %s", signLen, sprint_hex_inrow(sign, signLen));
}
if (!strcmp(key, "x5c")) {
res = CborGetArrayBinStringValue(&mapsmt, der, sizeof(der), &derLen);
cbor_check(res);
PrintAndLog("DER [%d]: %s", derLen, sprint_hex(der, derLen));
PrintAndLog("DER [%d]: %s", derLen, sprint_hex_inrow(der, derLen));
JsonSaveBufAsHexCompact(root, "$.AppData.DER", der, derLen);
}
}
@ -816,7 +821,7 @@ int MakeCredentionalParseRes(json_t *root, uint8_t *data, size_t dataLen, bool v
clientDataHash, 32, // Hash of the serialized client data. "$.ClientDataHash" from json
NULL, 0);
PrintAndLog("--xbuf(%d)[%d]: %s", res, xbuflen, sprint_hex(xbuf, xbuflen));
res = ecdsa_signature_verify(public_key, xbuf, xbuflen, sign, signLen);
res = ecdsa_signature_verify(coseKey, xbuf, xbuflen, sign, signLen);
if (res) {
if (res == -0x4e00) {
PrintAndLog("Signature is NOT VALID.");
@ -880,7 +885,9 @@ int CmdHFFido2MakeCredential(const char *cmd) {
if (showCBOR) {
PrintAndLog("CBOR make credentional request:");
PrintAndLog("---------------- CBOR ------------------");
TinyCborPrintFIDOPackage(fido2CmdMakeCredential, false, data, datalen);
PrintAndLog("---------------- CBOR ------------------");
}
res = FIDO2MakeCredential(data, datalen, buf, sizeof(buf), &len, &sw);
@ -903,7 +910,9 @@ int CmdHFFido2MakeCredential(const char *cmd) {
PrintAndLog("MakeCredential result (%d b) OK.", len);
if (showCBOR) {
PrintAndLog("CBOR make credentional response:");
PrintAndLog("---------------- CBOR ------------------");
TinyCborPrintFIDOPackage(fido2CmdMakeCredential, true, &buf[1], len - 1);
PrintAndLog("---------------- CBOR ------------------");
}
// parse returned cbor

30
client/fido/cose.c
View file

@ -71,7 +71,7 @@ COSEValueTypeNameDesc_t *GetCOSECurveElm(int id) {
}
const char *GetCOSECurveDescription(int id) {
COSEValueNameDesc_t *elm = GetCOSECurveElm(id);
COSEValueTypeNameDesc_t *elm = GetCOSECurveElm(id);
if (elm)
return elm->Description;
return COSEEmptyStr;
@ -160,6 +160,7 @@ int COSEGetECDSAKey(uint8_t *data, size_t datalen, bool verbose, uint8_t *public
CborParser parser;
CborValue map;
int64_t i64;
size_t len;
if(verbose)
PrintAndLog("----------- CBOR decode ----------------");
@ -191,6 +192,33 @@ int COSEGetECDSAKey(uint8_t *data, size_t datalen, bool verbose, uint8_t *public
// plain key
public_key[0] = 0x04;
// x - coordinate
res = CborMapGetKeyById(&parser, &map, data, datalen, -2);
if(!res) {
res = CborGetBinStringValue(&map, &public_key[1], 32, &len);
cbor_check(res);
if(verbose)
PrintAndLog("x - coordinate [%d]: %s", len, sprint_hex(&public_key[1], 32));
}
// y - coordinate
res = CborMapGetKeyById(&parser, &map, data, datalen, -3);
if(!res) {
res = CborGetBinStringValue(&map, &public_key[33], 32, &len);
cbor_check(res);
if(verbose)
PrintAndLog("y - coordinate [%d]: %s", len, sprint_hex(&public_key[33], 32));
}
// d - private key
uint8_t private_key[128] = {0};
res = CborMapGetKeyById(&parser, &map, data, datalen, -4);
if(!res) {
res = CborGetBinStringValue(&map, private_key, sizeof(private_key), &len);
cbor_check(res);
if(verbose)
PrintAndLog("d - private key [%d]: %s", len, sprint_hex(private_key, len));
}
if(verbose)
PrintAndLog("----------- CBOR decode ----------------");